Saw filing guide



Patented Nov. 24, 1931 THOMAS W. RoAcir, oF SEATTLE, WASHINGTON SAW FILING GUInE I 'Application filed May i, i929. seriaiir. 360,470.

My invention relates to devices intended for use in filing saws and consists'of a guide Vor indicating device-designed for application to a file When used for hand filing a saw, by

5 the use of Which the position of the Vfile may be accurately' controlled so as to give the saw teeth the proper bevel and inclination of face.

The object of my invention ris `to provide a simple, ldependable and cheap device applicable to a iile, vand Which accurately Shows Whether the file is properly positioned to secure the right shape of teeth; l

My invention consists of a supporting post or frame applicable toa ileupon Which is mounted an arm functioning as a plumb and carrying guide arms or fingers occupying angles such that When the device is positioned p to bring these guide lingers into parallelism,

` one With the saw and the other with theile,

the file Will occupy the proper position relative to the saW. f g

In the accompanying drawings' I have y shown my 'device as applied to the sawand the position thereof ,relative to thefsaw,`the

same being in a preferredtype of'construction. A

` Figure l is anv elevation of the device from Ythe side Which is towardsthe operator.V

f v3Q Figure 2 is a like vieW,With thedevice set for giving the side edges 'of the teeth a chosen angle and showing a short section of a'saw. Figure 3 is an elevation taken from oneside ofthe device. I u f .l Figure 4 is va top or plan view illustrating the manner of using the guides Which'determine the angular position of the axis ,ofV the file relative to the plane of the savv.V

In principle my invention consists of a plumb attachable to and supported from a file and carrying guide fingers Which, when in proper alignment Withthe saw and With the le, insure that the'file is in proper position relative to the sau7 to `produce a tooth having the desired angular flanks and cutting edges. Itcomprises, also, means for adgusting the Support for the plumb to correspond With different angular positions of the teeth flanks. Y

Asa supporting base forthe device I em- 'times a Clearview thereof. Thelbasefmemswinging by an Veye 34 carried by the support ploy aclamp Which is mountable upon, and in fixed relationv to the file. In theforin i1- flustrated this 4'clamp lconsists ,of a ring 1 of triangular shape when the device is' tobe used with a triangular Ele. A Set screw 10, Vor an equivalent device, secures the clamp upon the handle end of the file. J

p Carried by the clamp member `is a; base member V2 upon Whichv isV pivotallyrnounted a 'post 3, which supports the plumb" or bar'4 60 the latter being suspended from itssupport @3i The post?) is pivoted at 30 and preferably carries apointer Sllocated enough to one sidefof thepost to give the operatorv atfall ber 2 also carries an arcuate scale 20, marked Y each Wayfrom a Zero, ,to facilitate accurate Asetting of the supporter pos'tB. jIt is contemplatedthat there be sufficient friction in thepivot V30 to l:hold the support iriadjusted 70 position. Q p Y p A u The post has an upper end 32extending horizontally and forwardly, and Vpreferably proi'fide'dl With stops"orjenlargements 33 to retain irri-proper.v position ,the pivotal supporting eyes 40 carried by theforvvard'ly ex"- tending horizontal arm4l ofthe plumb bar 4'.' The ybar end :'32 functions as a guide'fin a manner Which'will'be laterlpointedfout. l y 'The' plumb' bar 4 is restrained in its side 3. At its lower end the plumb bar has three guide fingers Finger 42 should extend for AWardly parallel'fwith the axis ofthe file F.

Fingers 434 `and 44 extend laterally from the '85 base or 'inner end of fingerf42, at angles rela-v tive to nger 42 corresponding With the bevel anglelofthe` ledges of the saw teeth.v In` Figure 4 the finger 43 is parallel with the plane of the saw, indicated by the dotted, lines S. This position.v Would be lheld `While filing one 4side of all teeth, kand" finger 44 would be then Y placed parallel With the saw While ling the other sidesof theteeth. V l

In using my device itisfsecured uponthe handleend ,of the file. fTheAin-ger 42 should be parallel With the file axis.V .The support r3 is adjusted so that pointer -lfindicatesthel angle of inclinationl of Vthe",teeth edges' If the-file is put into filing positionv upon the 3 0@ In using this device,iftheieyes'ofthe;op-r

erator are focused upon the file, the u per arm 32 will appear asv two bars, andli' the" file be held so that the rfile centrally posi,- 15 tioned between these twoapparentfbars, and

,the bar 42 iscentral of thefile, then the pivot "bar 32 'is perpendicular over theile, which fis the` desired position. Actually,the bar 32 "and finger'42are in vertical alignment/with ea'ch other', and with the file. `I f the 'file be "tilted "sidewise, the, pivot '41 which is sup# -ported'ther-io'n willbe thrown toV one sideor the other, and the fnger"42,"which must hang vertically below this'pivot, is thrown to fthe ,2,5 f same side. Now the three pieces, arm'32, 'finger 42j'a`nd file F, Vare notin `vertical alignment-'with each' other, audit inmediately bencomes'evident that the Vfileis'tilted from its properposition,y andthe Vfiler Atwists it until V'the three elements referred ."to J are again. in vertical alignment.

Placingfthe; ling guide upon `thehandle Vfend of 'the 'file'fis ygreatlyto be preferred over ,"lacingit upon'fthe other end ofthe file. 'f irs't, the guide'is less inthe kway' and less "likelyto'b'elinjured;' second, it is possible to better align the guide with the saw y,as the {guideingersare lfora greater timerand more `thoroughly. between the eye of the operator the fsaw third, inaccuracy caused `by a slight "twist j of o Inrfth'etp'resent filing; guide I have lprovided for alignment in,everynecessary direction. The device 4is simple, in'expensivedin{construction, `is based on'orrect principles, and enablesacuiat Work being done, Y -WhatI claimas myinventionis: l v l. Asawilingguidehaving-anfarm swing- 50 :able transversely of the lefaffguideffinger aligna-ble with -thejile` and 'another guide vvfinger lalignable with 'thel saw, and yboth 'conj-ne'cte'd to said arm fto swing therewith, l'and Ymeans for supporting said vswinging arm 55 -u'pontheefile Y 2.A saw Elinglguidejcomprising'a lsupipfortifngmember vland"meansito secure it in Lfixed position 'upon a file, andra' guifdefinger freely swingably4 supported L'and pendent rom "said' supporting -`111'oe1nber, 4whereby the gfiefmay `,maintain saidng'erfpaauei 'to the th'ed edge offtles'aw,"byKkeepiigi the file proper tra''nsvzerseV angular relation i to the the tip Asection of theI file over thele, and carrying a finger extending and a plumb' suspended from-saidpostand 'extending from opposite sides of the first 75 mentioned;guide-finger, and at angles thereto corresponding with the angle of filing of the edges'o'fthe saw teeth.

- 4. A` saw filing guide including means to secure fileV thereto, gravity-controlled fmeans carried by said guide infposition to be 'visually aligned with'theile, and means for indicating "the angular position of an oper: ating lface ofthe file relative to an edge of a saw tooth. j

5. In a saw Yfiling guide the combination "with'a file 4holder of an upright I.post Lcarried 'bytheho'lder and a plumb suspended from the 'post and including means adapted to be visually aligned with the file. o

46. A saw "ling guide having a plumb bar Qther'eon adapted to swing transversely of the iile, and a'iinger extending laterally from the plumb bar, and free toswng therewith above and in substantial parallelismwiththe file. v

7. A saw filing guide comprising a base provided 'with 'means to secureX engagement with ale, an elevated support carried by said base, an angular -scale'cooperating with said support to indicate the angular. position of an operating farce of theiilerelative `to'anY edge of a saw tooth, and a plumb suspendedl from 4said eleva-ted support yand includingmeans Yadapted tov bealigned. 4with Va file secured to 4said vbase. n ...105

8;; A sawfling guide comprising abase having a socket for receiving a file end, .an Velevated supportV carried by said .baseV and adjustable in a plane which is. substantially perpendicular tothe-axis ofthe file, and a plumb suspended lfrom ,saidV elevatedv support tobe aligned with the liile. Y y y, 9. \A saw-filing guidecomprising an l-upright post, a plumb suspended from the post 115 .therefromin substantialparallelism with the vfle,iarnd means for supporting-,said post from the file and inl delinite 'angular relationship to the working facethereof.

10, VA saw Afiling guide f having *a base yincluding .an angle indicating scale adapted to be vsecured'to the file, an uprightpostpiv- -otally mounted upon saidfscalev andassociated therewith to `indicate its fangular position,

las adaptedto be-aligned with v4the'file rwhich is :secured to said-base. 11. :A saw filing-guide havingafbase @pro- Y vided with a socket for receiving a file end, 4an

upstandin-gi angle-indicatingscale having a 130 l pivot bearing, a post pivotally supported in said bearing and swinging in a plane which is substantially perpendicular to the axis of the le, and a plumb suspended from said post and adapted to be aligned with the file.

12. A saw filing guide having a base provided With a socket for receiving a file end, an upstanding angle-indicating scale having a pivot bearing, a post pivotally supported in said bearing and swinging in a plane which is substantially perpendicular to the axis of the file, and a plumb suspended from said post and adapted to be aligned with the file, Said plumb carrying an indicating linger extending over and in the plane of the file.

18. A saw iiling guide having a base adapted to be secured to the file, an angle-indicating scale supported on the base, a post pivotall mounted upon said scale and associated Vt ereWith, a plumb including a bar suspended from said post and adapted to be aligned With the le Which is secured to said base, and a restraining guide extending from the post andprovided With a loop enclosing the plumb bar.

Signed at Seattle, Washington, this 27th day oi April, 1929.

THOMAS W. ROACH. 

